Separable fastener



March 11, 1941. R, H CH 2,234,939

SEPARABLE FASTENER Filed 001;. 4, 1937 IN VEN TOR.

Mallard 14. Hatch.

ATTORNEYS.

Watented Mar. 11, 1941 UNITED STATES 2,234,939 7 SEPABABLE FASTENER Richard A. Hatch, New Rochelle, N. Y., assignor to Talon, Inc., a corporation at Pennsylvania Application October 4, 1937, Serial Not 167,091

5 Claims.

My invention relates to separable slide fasteners and particularly to lock sliders, an example of which is described and claimed in the Norton et a1. Patent No. 1,966,457, issued July 17,

5 ion. \v l The slider of the above-mentioned patent has been in large production for a considerable period of time and is satisfactory for many purposes. 011 some types of garments, however, for

m example a corset, the slider will sometimes be pulled. almost to the end of its movement but not all the way to the end. The automatic lock will function then to lock the slider in place and when the attempt is made to pull the garment lid off, great force will he applied to the sides of the opening. This will put a very severe strain on the locking device and on the bottom parts or the fastener and goods to which the fastener is attached, which may result in serious damage ltd to one or more parts of the fastener assembly,

The principal object therefore of my invention is to provide an improved slider which, while retaining all at the-normal functions and ad vantages of the'tlorton et al. patent, will over- $5 come the dlficulty referred to.

it will he ohserved that it an automatic loch slider is provided which will automatically no into locking position whenever the null is released during the closing movement or the slider, 3% hot which will not loch it the null is released during the opening movement at the slider, then the difiiculty will he overcome and at the sauce time, automatic locldnu nrovided Whenever a needed. in general, therelorc, any invention provides means on the locldnu urts which will iunction to hold the loch in its released, position whenever the null is released during the opening movement.

in the acconin Tlnlu draninu, l. have shown for purposes oi illustration, two euihodimentu which my invention may assume in nractlce. tn the drawing:

Fig. l is a plan view or a slide tastener equipped with my improved locldnu device;

his. 2 is a side view at the slider on a section of fastener with parts'hrohen away to tacilitate illustration; a

t is a cross-section view on the line M of l; t

lug. d is a perspective view at the upper slider hody with parts hrolren away to facilitate illustratlon; I

l te. 5 is a longitudinal central section throush the slider with the locking arm in unlocked nodtion;

the loclrlne urrn it has a nolnted projection dd Fig. 6 is a view of the slider showing theunlocked position;

Fig. 7 is a view of the slider showing locked position;

Fig. 8 is a view of a slider of slightly varied form with the locking arm removed; and

Fig. 9 is a view similar to Fig. 7, but with the locking arm in place and showing the slider in unlocked position. v

In carrying the invention into effect, the 10 slider is formed of any suitable size and shape to lit the fastener on which it is used. The fastener illustrated is a welllmown type comprising fabric tapes ll, having closely spaced interlocking fastener elements a, attached to the is adjacent edges of the tapes. "the slider body it comprises upper and lower plates ll and l2 respectively, with side. flanges it for guiding the fastener elements into engagement. the upper and lower plates are connected by the integral neclr l t.

d lug it n formed on the hotly oi the slider, such lug heine; preferably elongated lengthwise or the slider and havinh at one end a hole or w indentation it and at the other end a shoulder or projection ll. .d locking arm id in the term of a hollow sheet metal member having top and side walls and preferably end walls, is mounted over the lug it and is pivotally attached to said lug adjacent one end hy projections lt extending into the indentation it. The side walls of said arni lll have inclined surfaces lid and ll and near the tree end a recess or notch t. The lug has a recess dd inurhich is anchored a hat lent sprlnn dd. "this spline ertends over the lug to the other side ol' the pivot and hears against the internal surface or the hach wall of the locldnn arui it. at the opposite or tree end tormed as an extension oi one side wall, which normally nrolects throueh the opening to in the ton plate of the slider hotly into engagement with the tastener elements as seen in-Flg. 2. "The action at sprlnu lid on the lochlne? arm is such as to tend to urge the locmur protection into locmnu' position hetweeu any pair of fastener elements, or seen in the. d.

the null talc ll may he oi any convenient turns and the one shown herein is hiiurcated at one end to embrace the looming arm. The ends oi the hiiurcations are turned inwardlyto form (pivot lugs dB. The null tab when used tor operciting the slider to open the fastener engages the inclined surfaces til, said surfaces directing slider nivet lugs 28 into recess or channel at, said channel or recess being of proper proportions in conjunction with slider pivot lugs 28 to lift locking projection 25 out of engagement with the fastener elements.

The recesses are designed and are of such size that the pivot lugs 28 will snap into them. and when the pull tab is released in that position, the pivot lugs will hold the locking member out of locking engagement.

In the modified form there is no alteration of the locking arm from the former construction, but instead there are one or more small bumps or projections 29, formed integral with the slider lift the locking arm to unlocked position, and inv any case the locking point is designed with an inclined surface to the rear so that it will never prevent movement of the slider to close the fastener. If, however, the pull tab is released at any position during such closing movement, thespring will cause the locking arm to move automatlcally to locked position as more fully 4 described in the Norton et a1. patent above referred to. On the other hand, in opening the fastener, the slider will automatically unlock, but. if the pull tab is now released, the slider will not automatically lock. The result is that when the wearer of the garment fails to move the slider deliberately all the way to the end of its travel in opening the fastener, a force placed on the slider will move it to .c'om-pletely open position without any excessive stress being placed on the slider 01, adjacent .parts. Accordingly, we believe that a large number of fastener failures will be eliminated, especially in such garments as corsets.

While I have shown and described in this application two embodiments which my invention may assume in practice, these embodiments are merely for the purpose of illustration and description, and various other forms may be devised within the scope of my invention as set forth in the appended claims.

What I claim is:

1. In a slide fastener of the class described, a slider movable from one end to the other of the fastener for opening and closing the same, a pull member connected to the slider, a slider locking device having means engageable by said pull member, means for automatically moving the locking device to locked position when the pull member is released at any position during the closing movement of the slider, and means cooperating with said pull member for holding the locking device in unlocked position when the pull member is released during opening movement of the slider.

2. A slider for slide fasteners of the class described comprising a. slider body, a locking member connected thereto and movable relative to the slider body to locked and unlocked positions, a pull tab connected to the slider and engageable with said-locking member to lift the same to unlocked position during opening or closing movement of the slider, and means for normally urging said locking member-to locked position when the pull member is released, and cooperating means on said locking member and pull for holding said locking member unlocked upon such release when the pull is in full forward position for opening the fastener. I 3. A slider for slide fasteners of the class described, comprising a slider body, a locking member pivoted at one end to said slider body and having a locking projection on its other end, a pull tab attached to said locking member and having pivot lugs engageable with said locking member for lifting the same out of locking engagement during the opening or closing movements, and a notch in said locking member in position for retaining one of said pivot lugs during opening movement of the slider to hold said locking member in unlocked position even when the pull isreleased.

4. A slider for slide fasteners of the class described, comprising a slider body, a locking member pivoted at one end to said slider body for limited pivotal movement to locked and unlocked positions, said locking member having lengthwise extending recesses in its sides, a pull member having pivot lugs engaged in said recesses and adapted to transmit a lifting force to said locking member to lift it to unlocked position during opening or closing movements, and a spring operating on said locking member normally urging it to locked position, said recesses in the locking member having notches at their forward ends in which said pivot lugs will remain and hold the locking member out of locking engagement when the pull is released in opening the fastener.

5. A slider for slide fasteners of the class described, comprising a slider body, a locking member pivoted at one end of the slider body, a spring normally urging said locking member to locked position, said locking member being hollow and having recesses with inclined surfaces in its side walls, a pull member having pivot lugs projecting into said recesses and engageable with said inclined surfaces and a projection on the slider body adjacent the forward end of said recesses to retain the pivot lug of the pull member at the forward end of its travel, said pivot lugs having 'sufficient thickness to hold the locking member 

